2. Signaling Pathways
  3. Immunology/Inflammation
  4. NO Synthase

NO Synthase

Nitric oxide synthases; NOS

NO Synthase

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Nitric oxide synthases (NOSs) are a family of enzymes catalyzing the production of nitric oxide (NO) from L-arginine. NO synthases catalyze the oxidation of L-arginine to NO and L-citrulline. Mammals contain three NOS isoforms: neuronal NOS (nNOS), inducible NOS (iNOS), and endothelial NOS (eNOS). NO produced from these different NOS isoforms is involved in a wide range of physiologic functions in the nervous, immune, and cardiovascular systems. Unregulated NO production can lead to pathologic conditions such as stroke, inflammation, and hypertension. Therefore, the control of NOS activity by isoform selective NOS inhibitors has great potential for therapeutic treatments of NO-related diseases.

NO Synthase Isoform Specific Products:

NO Synthase Isoform Comparison
Cat. No. Product Name Effect Purity Chemical Structure
  • HY-151241
    Sinomenine N-oxide
    		Inhibitor ≥99.0%
    Sinomenine N-oxide has anti-angiogenic, anti-inflammatory and anti-rheumatic effects. Sinomenine N-oxide is also a NO production inhibitor, with an IC50 value of 23.04 μM.
    Sinomenine N-oxide
  • HY-120221
    SE 175
    		Inducer
    SE 175 is an organic nitrate compound that acts as an NO donor in vivo following reductive transformation of the nitrate group to nitric oxide. SE 175 stimulates endothelial soluble guanylate cyclase and induces aortic vasorelaxation with an EC50 of 0.20 µM.
    SE 175
  • HY-N12494
    Diplacol
    		Inhibitor
    Diplacol is a geranylated flavanone that can be isolated from paulownia trees (Paulownia coreana UYEKI). Diplacol has anti-inflammatory activity. Diplacol inhibits NO production in LPS-stimulated Raw264.7 cells with an IC50 value of 4.53 μM.
    Diplacol
  • HY-107632G
    GYY4137 (GMP)
    		Inhibitor
    GYY4137 (GMP) is the GMP-grade version of GYY4137 (HY-107632). Small molecules of GMP grade can be used as adjuvant reagents in cell therapy. GYY4137 (GMP) is a sustained-release H2S donor possessing vasodilatory, antihypertensive, and anti-inflammatory activities. GYY4137 (GMP) can inhibit cell growth, induce apoptosis, and cause cell cycle arrest by blocking the STAT3 pathway, demonstrating potent anticancer activity.
    GYY4137 (GMP)
  • HY-N15571
    Hedopeptolide
    		Inhibitor
    Hedopeptolide can be found in the marine cyanobacteria Okeania sp. Hedopeptolide inhibits LSP-induced NO production in RAW264.7 cells (IC50: 4 μM). Hedopeptolide exhibits anti-inflammatory activity.
    Hedopeptolide
  • HY-115889
    L-NAPNA
    		Inhibitor
    L-NAPNA is a nitric oxide synthase (NOS) inhibitor with an IC50 of 1.4 μM. L-NAPNA exhibits analgesic effects by inhibiting formalin-induced paw licking behavior in mice (ED50 of 57.2 mg/kg) and suppressing acetic acid-induced abdominal writhing in mice (ED50 of 25 mg/kg). L-NAPNA can be used in research related to central nervous system diseases.
    L-NAPNA
  • HY-130325
    α-Guanidinoglutaric acid
    		Inhibitor
    α-Guanidinoglutaric acid is a guanidino compound first found in cobaltinduced epileptogenic focus tissue in the cerebral cortex of cats. α-Guanidinoglutaric acid induces epileptic seizures in rats after intraventricular administration.
    α-Guanidinoglutaric acid
  • HY-N2518R
    Agnuside (Standard)
    		Inhibitor
    Agnuside (Standard) is the analytical standard of Agnuside. This product is intended for research and analytical applications. Agnuside is used in the study of asthma, inflammation, and angiogenic diseases. Agnuside is an orally active compound that can be extracted from Vitex negundo.
    Agnuside (Standard)
  • HY-N13701
    3β,7β,15α-Trihydroxy-4-(hydroxymethyl)-11,23-dioxo-lanost-8-en-26-oic acid
    		Inhibitor
    3β,7β,15α-Trihydroxy-4-(hydroxymethyl)-11,23-dioxo-lanost-8-en-26-oic acid is a triterpene compound that can be found in Ganoderma lucidum, and it inhibits nitric oxide (NO) production in BV-2 microglial cells induced by lipopolysaccharide (LPS, HY-D1056), with an IC50 of 4.15 μM.
    3β,7β,15α-Trihydroxy-4-(hydroxymethyl)-11,23-dioxo-lanost-8-en-26-oic acid
  • HY-B1581AR
    L-Canavanine sulfate (Standard)
    		Inhibitor
    L-Canavanine (sulfate) (Standard) is the analytical standard of L-Canavanine (sulfate). This product is intended for research and analytical applications. L-Canavanine sulfate is a selective inhibitor of inducible NO synthase.
    L-Canavanine sulfate (Standard)
  • HY-107690R
    DMPO (Standard)
    		Activator
    DMPO (Standard) is the analytical standard of DMPO. This product is intended for research and analytical applications. DMPO is a cell permeable hydrophillic spin trap agent for superoxide detection.
    DMPO (Standard)
  • HY-12122
    AR-C102222
    		Inhibitor
    AR-C102222 is a spirocyclic fluoropiperidine quinazoline selective iNOS inhibitor. AR-C102222 can be used for the research of neuropathic pain.
    AR-C102222
  • HY-149724
    Anti-inflammatory agent 65
    		Inhibitor
    Anti-inflammatory agent 65 (compound 29) is a Hederagonic acid derivative with potent anti-inflammatory activity. Anti-inflammatory agent 65 inhibits nitric oxide (NO) release. Anti-inflammatory agent 65 inhibits the nuclear translocation of IRF3 and p65, and disrupts the STING/IRF3/NF-κB signaling pathway, thereby attenuating the inflammatory response.
    Anti-inflammatory agent 65
  • HY-B0679R
    Lubiprostone (Standard)
    		Inhibitor
    Lubiprostone (Standard) is the analytical standard of Lubiprostone. This product is intended for research and analytical applications. Lubiprostone (SPI-0211) increases intestinal fluid secretion through generation of CIC-2/CFTR and activation of cAMP signaling pathway. Lubiprostone inhibits myeloperoxidase (MPO) activity, downregulates Indomethacin (HY-14397)-induced iNOS and TNFα expression. Lubiprostone can be used for chronic constipation research.
    Lubiprostone (Standard)
  • HY-122063
    FR260330
    		Inhibitor
    FR260330 is a selective, orally active inhibitor for inducible nitric oxide synthase (iNOS) through suppression of iNOS dimerization. FR260330 inhibits the NO accumulation in rat splenocytes and human DLD-110 cells, with IC50 of 27 and 10 nM. FR260330 ameliorates the Lipopolysaccharides (HY-D1056)-induced inflammatory diseases in rats model.
    FR260330
  • HY-N1500R
    Pulegone (Standard)
    		Inhibitor
    Pulegone (Standard) is the analytical standard of Pulegone (HY-N1500). This product is intended for research and analytical applications. Pulegone is a monoterpene ketone compound widely present in the essential oils of many plants. Pulegone can also be used as a bird repellent. Pulegone has multiple activities such as anti-inflammatory, antibacterial, antifungal, and anti-hyperalgesic effects. Pulegone is particularly effective against bacteria of the Salmonella species.
    Pulegone (Standard)
  • HY-W753779
    8-Hydroxygenistein
    		Inhibitor
    8-Hydroxygenistein (8-OHG) is an antioxidant that can effectively scavenge nitric oxide (NO) and superoxide anion (O₂⁻). 8-Hydroxygenistein belongs to ortho-dihydroxy isoflavones (ODI) and is abundantly present in dark soy sauce and light soy sauce. Its antioxidant activity is stronger than that of its parent compound genistein (HY-14596). The content of 8-Hydroxygenistein is positively correlated with the antioxidant capacity of soy sauce (r = 0.959), and it remains highly stable even after being heated in boiling water for 60 minutes. During the brewing and storage of soy sauce, 8-Hydroxygenistein effectively prevents oxidative damage, making it promising for use in food antioxidant research.
    8-Hydroxygenistein
  • HY-N0635R
    Prim-O-glucosylcimifugin (Standard)
    		Inhibitor
    Prim-O-glucosylcimifugin (Standard) is the analytical standard of Prim-O-glucosylcimifugin. This product is intended for research and analytical applications. Prim-O-glucosylcimifugin exerts anti-inflammatory effects through the inhibition of iNOS and COX-2 expression by through regulating JAK2/STAT3 signaling.
    Prim-O-glucosylcimifugin (Standard)
  • HY-N12224
    1-Heptadecanoyl-rac-glycerol
    		Inhibitor
    1-Heptadecanoyl-rac-glycerol (1-Heptadecanoin) is a glyceride compound with anti-inflammatory activity. 1-Heptadecanoyl-rac-glycerol inhibits the occurrence of inflammation by suppressing the expression of inducible nitric oxide synthase (iNOS) related to inflammation. 1-Heptadecanoyl-rac-glycerol can be used for research on diseases related to inflammation.
    1-Heptadecanoyl-rac-glycerol
  • HY-N3182A
    N-Methylnuciferine iodide
    		Inhibitor
    N-Methylnuciferine iodide, an alkaloid from Lotus Plumule, ameliorate lipopolysaccharide-induced depression-like behavior.
    N-Methylnuciferine iodide
Cat. No. Product Name / Synonyms Application Reactivity
NO Synthase Isoform Comparison

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